Question: What is the significant event held in the beginning of Laser Interferometer Gravitational-Wave Observatory in 1994
Paraphrase: What happened in 1994 at the start of the Observatory?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q255371 p:P793 ?s . ?s ps:P793 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1994')) }